MCAT Biology

260 free practice questions for the MCAT

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The Medical College Admission Test (MCAT) is administered by the Association of American Medical Colleges. Since 2007, the exam has become computer-based and is given 24 times a year. The MCAT is an entrance exam for prospective medical students in the United States and Canada.
Section breakdown:
  • Physical Sciences (PS)
  • Verbal Reasoning (VR)
  • Writing Sample (WS)
  • Biological Sciences (BS)
IMPORTANT: "The Writing Sample section will be removed from the current MCAT in 2013. If you plan to take the MCAT in 2013 or 2014, the current exam will be modified and the Writing Sample section will no longer be part of the exam. In its place, a voluntary, unscored trial section will be added starting in January 2013."
In 2010, 82,004 students took the MCAT exam internationally. The mean score 25.0 with a standard deviation of 6.4. The highest possible score is 45.

This free practice test is a pre-exam refresher featuring 261 realistic questions in biology and chemistry for the MCAT. Additionally, it is a worthwhile study guide for any medical type exam requiring biology and chemistry knowledge at the 101 and 201 levels.

Need more science review questions? Try our Biomedical Admissions test prep set, with dozens of science knowledge quesitons.

Disclaimer: This content is provided for informational purposes only. It has not been edited, fact checked or updated. This content is neither affiliated nor endorsed by the Association of American Medical Colleges. These questions were written by a third party test prep company and licensed by PracticeQuiz for use on this site. Please use at your own discretion.


There are 59 questions on the Biology section of the MCAT.

The Biology section of the MCAT is 1 hour and 35 minutes long.

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Ted Chan

Ted Chan

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Ted Chan is the Managing Editor of Ted has experience as a journalist and a writer, including editorial or content production roles at ESPN, Better Business Bureau, The Boston Globe, and Forbes. Ted holds a BA from Swarthmore College with High Honors, and a MBA from the MIT Sloan School of Management. Ted also studied at the Harvard Business School, earning a Certificate in Value-based Health Care Delivery.

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